About the plot setting in the paper about unlearnable-examples HOT 2 CLOSED

def plot_lines(data, labels=[], colors=[], linestyles=[], width=[], xticks=None, x_label=None, y_label=None,
               title=None, filename=None):
    fig = plt.figure(figsize=(10, 10), dpi=120)
    for i, item in enumerate(data):
        plt.plot(item, label=labels[i], color=colors[i], linewidth=width[i], linestyle=linestyles[i])
    if x_label is not None:
        plt.xlabel(x_label, size=42)
    if y_label is not None:
        plt.ylabel(y_label, size=42)
    if xticks is not None: 
        plt.xticks(range(len(xticks)), xticks, size=42)
    plt.ylim(0.3, 1.05)
    plt.yticks(size=36)
    plt.xticks(size=36)
    plt.legend(loc='lower right', fontsize=32, ncol=1)
    if title is not None:
        plt.title(title, size=42)
    if filename is not None:
        plt.savefig(filename, bbox_inches='tight')
    plt.show()
    plt.close()